William N. Sosis, Esq.
Constitutional Advocate. Legal Reformer. Relentless Defender of the Public Good.

William N. Sosis is not just an attorney — he is a force of accountability. As the founder of Sosis Law, LLC in Mansfield Township, New Jersey, Sosis brings principled defiance to a legal system that often forgets who it is meant to serve. He is a criminal defense attorney who doesn’t just fight cases — he fights structures. When government power veers off course, when due process is reduced to a formality, and when justice is distorted by convenience, William Sosis doesn’t compromise — he confronts.

With a sharp command of New Jersey criminal law and procedural nuance, Sosis is a tactical litigator. His courtroom arguments are precise, his motions are unflinching, and his cross-examinations are calibrated to reveal truth and expose pretext. He routinely challenges illegal searches, overreaching warrants, flawed forensic methods, and prosecutorial shortcuts. In a legal culture increasingly defined by plea deals and time-saving tactics, Sosis insists on the hard path — the constitutional one.

But his work doesn’t stop at the courthouse door. Sosis is also a public records warrior and administrative law critic. He has filed detailed and strategically framed petitions before regulatory agencies like the New Jersey Board of Public Utilities (BPU), demanding transparency, accountability, and constitutional adherence. His filings target not just the symptoms of government overreach — they go to the root: privacy violations, economic coercion, erosion of informed consent, and the creeping normalization of forced compliance.

William Sosis is as comfortable crafting a 10,000-word policy brief as he is dissecting a defective indictment. He has written extensively on the history and abuse of plea bargaining, the failures of the U.S. healthcare system, and the unconstitutional underpinnings of modern administrative law. His reviews of works like Philip Hamburger’s Is Administrative Law Unlawful? and Dan Canon’s Pleading Out aren’t just academic commentary — they are part of a larger mission to revive public discourse around liberty, power, and law.

He believes law should be rooted in ethics, not just authority — in moral reason, not just procedural precedent. To that end, he creates online resources that translate complex legal systems into accessible guides for real people. His FAQ pages are blueprints for navigating the criminal justice system. His essays challenge the elitist mythology of legal professionalism. His firm’s website doesn’t market — it educates, it warns, it empowers.

Sosis’s legal practice is underscored by an uncompromising belief: that the law belongs to the people, not to the privileged. That constitutional rights are not relics, but weapons against tyranny. And that justice should never be abstract — it should be lived, demanded, and defended.

Whether he’s uncovering contradictions in a victim’s sworn statement, challenging a coercive smart meter policy, or suing for public records that the government would prefer remain hidden, William N. Sosis practices law the way it was always meant to be practiced — as a check on unchecked power.